Height adjustment platform



FIG. 1 is a top perspective view of a height adjustment platform, showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a left side elevation view thereof;

FIG. 8 is a right side elevation view thereof;

FIG. 9 is a top perspective view thereof shown in an alternative position of use;

FIG. 10 is a bottom perspective view thereof;

FIG. 11 is a top plan view thereof;

FIG. 12 is a bottom plan view thereof;

FIG. 13 is a front elevation view thereof;

FIG. 14 is a rear elevation view thereof.

FIG. 15 is a left side elevation view thereof; and,

FIG. 16 is a right side elevation view thereof.

The broken line portions of the drawing figures are included to show portions of the height adjustment platform that form no part of the claimed design. 

CLAIM The ornamental design for a height adjustment platform, as shown and described. 